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NEET • BIOLOGY • LOCOMOTION AND MOVEMENT

Locomotion and movement practice · Medium

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1 Medium

1 of 104

Understanding +4 | -1

Read the following statements about human skeleton system and choose the option that correctly states them true (T) and false (F).
a. Total number of bones in hind limbs are 60
b. There are 26 bones in vertebral column of an adult man
c. There are 2 pairs of vertebrochondral ribs
d. Axial skeleton is comprised of 80 bones

View answer and explanation

Correct option: B

a-T,b-T,c-F,d-T

Option A (a-T, b-T, c-F, d-T) is correct because it accurately identifies the true and false statements about the human skeleton.

2 Medium

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Analyzing +4 | -1

Assertion : Muscle contraction force increases
with rise in strength of stimulus.

Reason : This is due to increased contraction of
individual muscle fibres with increase in stimulus
strength.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option A (Meromyosin) is correct because meromyosin is a component of the thick filament (myosin), not the thin filament.

3 Medium

3 of 104

Remembering +4 | -1

What are store house of calcium ions

View answer and explanation

Correct option: A

sarcoplasmic reticulum of muscle fibre

Option A (sarcoplasmic reticulum of muscle fibre) is correct because the sarcoplasmic reticulum is the specialized endoplasmic reticulum in muscle cells that stores calcium ions.

4 Medium

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Understanding +4 | -1

I. Sarcoplasmic reticulum are abundant II. Myoglobin content is high III. Sarcoplasmic reticulum are moderate IV. Aerobic muscles V. Depends on anaerobic respiration for energy VI. Less myoglobin content Select the option with correct statements for red muscle

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Correct option: D

II and IV

Option D (II and IV) is correct because red muscle fibers have high myoglobin content and are aerobic muscles.

5 Medium

5 of 104

Understanding +4 | -1

During skeletal muscle contraction following events occur-
I. I-band shortens II. A-band shortens
III. H-zone shortens IV. Sarcomere contract
V. ATP changes to ADP and Pi
Choose the option with incorrect events

View answer and explanation

Correct option: D

Only II

Option D (Only II) is correct because during skeletal muscle contraction, the A-band does not shorten; it remains the same length.

6 Medium

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Analyzing +4 | -1

Which of the following pairs of joints are of same type?

View answer and explanation

Correct option: A

Atlas-axis - Radio-ulnar

Option A (Atlas-axis - Radio-ulnar) is correct because both pairs are pivot joints.

7 Medium

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Remembering +4 | -1

…A… band contains actin and is called …B…. band, whereas the ….C… band called ….D… band contains myosin
Choose the correct options for A, B and C to complete the given NCERT statement

View answer and explanation

Correct option: A

A-Light, B-I, C-dark, D-A

Option A (A-Light, B-I, C-dark, D-A) is correct because the I-band is light and contains actin, while the A-band is dark and contains myosin.

8 Medium

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Remembering +4 | -1

Hydra uses its tentacles for;

View answer and explanation

Correct option: D

both (1) and (2).

Option D (both (1) and (2)) is correct because Hydra uses its tentacles for both locomotion and catching prey.

9 Medium

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Understanding +4 | -1

Assertion: Inflammation of a skeletal joint may immobilise the movements of the joint.
Reason: Uric acid crystals in the joint cavity and ossification of articular cartilage lead to this.

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Option A (If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion) is correct because inflammation and uric acid crystals can both immobilize joint movements.

10 Medium

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Understanding +4 | -1

Which statement is correct for muscle contraction

View answer and explanation

Correct option: B

length of A-band remains constant

Option B (length of A-band remains constant) is correct because the A-band represents the length of the myosin filament, which does not change during muscle contraction.

11 Medium

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Understanding +4 | -1

Choose the incorrect statement about the skeletal muscles

View answer and explanation

Correct option: D

None of the above

Option D (None of the above) is correct because all the statements about skeletal muscles are accurate; they are under voluntary control, known as voluntary muscles, and involved in locomotion and posture.

12 Medium

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Understanding +4 | -1

Which of the following are the properties of cardiac muscles?
I. They are the muscles of the heart
II. They are non-striated
III. They are involuntary in their functions
IV. They are made up of fascicles
Select the correct option

View answer and explanation

Correct option: A

I and III

Option A (I and III) is correct because cardiac muscles are indeed the muscles of the heart and they are involuntary in their functions.

13 Medium

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Understanding +4 | -1

Consider the following statements.
I. In man, vertebral column has 33 bones organized as 28 bones.
II. Pelvic girdle is made up of two fused bones only.
III. Osteoporosis is characterized by micro-architectural deterioration of the bone.

View answer and explanation

Correct option: C

III is correct

Option C (III is correct) is correct because Osteoporosis is indeed characterized by micro-architectural deterioration of the bone.

14 Medium

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Remembering +4 | -1

Synovial joints is humans are characterized by

View answer and explanation

Correct option: B

Presence of fluid filled synovial cavity

Option B (Presence of fluid filled synovial cavity) is correct because synovial joints are characterized by the presence of a fluid-filled synovial cavity.

15 Medium

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Remembering +4 | -1

Cross arms of the myosin monomer consists of

View answer and explanation

Correct option: B

Outward projection of the head region of meromyosin

Option B (Outward projection of the head region of meromyosin) is correct because the cross-bridges are formed by the globular head of the meromyosin.

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16 Medium

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Understanding +4 | -1

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chances of fractures.
Reason (R): Common cause of osteoporosis in increased levels of estrogen.
In the light of the above statements, choose the most appropriate answer from the options given below:

View answer and explanation

Correct option: D

(A) is correct but (R) is not correct

Option D ((A) is correct but (R) is not correct) is correct because osteoporosis is characterized by decreased bone mass, but it is caused by decreased, not increased, levels of estrogen.

17 Medium

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Remembering +4 | -1

Progressive degeneration of skeletal muscle due to genetic disorder is called

View answer and explanation

Correct option: D

Muscular dystrophy

Option D (Muscular dystrophy) is correct because it is a genetic disorder characterized by the progressive degeneration of skeletal muscle.

18 Medium

18 of 104

Understanding +4 | -1

Joint present between bones tibia and femur is also present in between

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Correct option: C

Humerus and ulna

Option C (Humerus and ulna) is correct because the knee joint (tibia and femur) and the elbow joint (humerus and ulna) are both hinge joints.

19 Medium

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Understanding +4 | -1

Osteoporosis, an age related disease of skeletal system, may occur due to

View answer and explanation

Correct option: D

decreased level of estrogen

Option D (decreased level of estrogen) is correct because osteoporosis is often associated with decreased estrogen levels, especially in post-menopausal women.

20 Medium

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Remembering +4 | -1

Joints are classified into three major types. They are
I. Fibrous joint II. Hinge joint
III. Cartilaginous joint IV. Pivot joint
V. Synovial joint
Select the option containing correct articles

View answer and explanation

Correct option: A

I, III and V

Option A (I, III and V) is correct because the three major types of joints are Fibrous, Cartilaginous, and Synovial. Hinge and Pivot are types of Synovial joints.

21 Medium

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Analyzing +4 | -1

Read the following statements and identify the incorrect one.

View answer and explanation

Correct option: C

In the muscle fibers which have less quantity of myoglobin, the number of
mitochondria as well as sarcoplasmic reticulum is also less

Option C ((A) is True but (R) is False) is correct because after death, rigor mortis (stiffening) occurs due to the lack of ATP, preventing myosin from detaching from actin, but the reason provided is not the correct explanation.

22 Medium

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Understanding +4 | -1

What is the correct order that a motor nerve impulse travels when triggering a muscle contraction?

View answer and explanation

Correct option: A

Motor nerve

\to

Synaptic cleft

\to

Sarcolemma

\to

Sarcoplasmic reticulum

\to

Troponin

Option A (Motor nerve

\to

Synaptic cleft

\to

Sarcolemma

\to

Sarcoplasmic reticulum

\to

Troponin) is correct because it represents the correct sequence of events in muscle contraction.

23 Medium

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Understanding +4 | -1

During muscular contractions, which of the following events occur?
i) H - Zone disappears
ii) A band widens
iii) I - band reduces in width
iv) width of A band is unaffected
v) M line and Z line come closer

View answer and explanation

Correct option: A

i, iii, iv & v

Option A (i, iii, iv & v) is correct because it accurately describes the events that occur during muscular contractions.

24 Medium

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Remembering +4 | -1

Which of the following is the store house of calcium in muscles?

View answer and explanation

Correct option: B

Sarcoplasmic reticulum

Option B (Sarcoplasmic reticulum) is correct because the sarcoplasmic reticulum is the primary intracellular storage site for calcium ions in muscle cells, essential for regulating muscle contraction.

25 Medium

25 of 104

Understanding +4 | -1

Arrange the given steps of muscle contraction in the series of events from first to last
I. Myosin head binds to the exposed active site on action to form a cross bridge
II. The Z-line attached to these actin are also pulled in wards there by causing shortening of sarcomere also called contraction
III. This pulls the attached actin filaments towards the centre of A -band
The correct option is

View answer and explanation

Correct option: C

I → III → II

Option C (I → III → II) is correct because it represents the correct sequence of events in muscle contraction, starting with myosin head binding and ending with sarcomere shortening.

26 Medium

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Remembering +4 | -1

I-bands of myofibrils are bisected by

View answer and explanation

Correct option: C

Z-lines

Option C (Z-lines) is correct because Z-lines bisect the I-bands of myofibrils.

27 Medium

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Understanding +4 | -1

Statement I: Methods of locomotion performed by animals vary with their habits and demand of the situation.

Statement II: Walking & running on land, climbing on trees, flying in air, swimming in water are different types of locomotion based on habitats.

View answer and explanation

Correct option: B

Only statement II is correct

Option B (Only statement II is correct) is correct because statement II accurately describes different types of locomotion based on habitats, while statement I is too general.

28 Medium

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Remembering +4 | -1

Osteoporosis is a

View answer and explanation

Correct option: A

Age related disorder

Option A (Age related disorder) is correct because osteoporosis is primarily associated with aging and the decline in bone density that occurs with age.

29 Medium

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Remembering +4 | -1

Actin protein occurs in which of the following two forms?

View answer and explanation

Correct option: A

Polymeric F – actin and monomeric G – actin

Option A (Polymeric F – actin and monomeric G – actin) is correct because actin exists as a monomer (G-actin) that polymerizes to form filaments (F-actin).

30 Medium

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Analyzing +4 | -1

Assertion : There are similarities between the
locomotion of unicellular organisms and
multicellular animals.

Reason : Ciliary, flagellar and amoeboid
movements occur in unicellular organisms.

View answer and explanation

Correct option: B

If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion

Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because both statements are true, but the reason doesn't directly explain the assertion.

Revision notes and key takeaways

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Key Takeaways

✓ This set contains 104 single-correct-answer MCQs on LOCOMOTION AND MOVEMENT.
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